Yes of course they are still in fully functioning condition. The video cards won't come in the original box, but will come wrapped in anti-static packaging. The only thing that the video cards came with was the card itself and the driver CD, but that doesn't even have the newest version of CCC on it so I'd recommend you simply download the latest version of CCC when installing the cards.

No, I didn't do any overclocking to the cards, so rest assured they have not been abused!